How can I find all files in Google Drive where a user besides myself is an owner? I'm an owner on all documents that I create, and whenever I share with someone, I usually give them at most "editor" ...

I uploaded a 10 min video to youtube, but I am only interested in some "intervals" like the one between minute 4 to 5. I wonder if there are some online editors somewhere that allow to "cut" it, and ...